Karl and Chris return to Nepal to attempt the Everest Base Camp Trek. The 12 day trek is a round trip of 124km, reaching an altitude of 5,545 metres or 18,192 feet. The problem however is that 18 months beforehand, they tried to reach the Tibetan Everest Base Camp only for Chris to be hospitalised for 3 nights with severe altitude sickness. After failing to reach Everest on that trip they return to Nepal to complete their Quest. This is the epic finale to the Quest For Everest trilogy!